Maestro
Human Vibration Meter
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Vibration in the workplace is becoming a major concern, due to the increase in industrial injuries caused by high vibration levels.
For many products, such as power tools, low vibration levels give a competitive advantage.
Maestro is a simple and modular instrument, designed for all aspects of human vibration measurements.All dedicated measurement functions, transducers and accessories are available for whole-body and hand/arm measurements, using a triaxial accelerometer connected to the multichannel input of Maestro.
Thanks to its unique four-channel design, Maestro can also be used for SEAT (Seat Effective Acceleration Transmissibility) measurements, with an extra accelerometer connected to the fourth channel. Alternatively, a microphone can be connected to the fourth channel to give simultaneous measurements of noise and triaxial vibration.
The modularity of Maestro allows you to build up a complete configuration for your needs, at a competitive price. A basic version is also available for general purpose vibration measurements, using a mono-axial accelerometer.
With a large graphical display, and intuitive menu system, Maestro is always easy to use for any applications : one-off or production line tests, or health & safety, whatever the product or environment.
The AC output (for each of the four channels) can also be connected to a spectrum analyser for further analysis.
Multi-application
4 channels simultaneously
Digital filtering
Robust
Ease of use
Complete
Noise option
The Maestro human vibration meter is available with several different firmware options, perfectly adapted to the needs of each application :
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whole body (3 channels), |
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hand-arm (3 channels), |
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general vibration (single channel), and |
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noise (single channel) |
All the modules are compatible and can be loaded into the instrument in any combination.
Whole-body :
Supplied with a seat adapter (rubber pad) for housing the low-frequency triaxial accelerometer, and featuring the corresponding ISO weightings, Maestro is a complete whole body vibration measurement system.
SEAT option (accelerometer on 4th channel for "z" reference to calculate the SEAT coefficient) - A tough mounting bracket can be used to mount Maestro for on-board measurements.
Hand-arm :
Using the same lightweight transducer as for the whole body measurement, but mounted on a hand adapter, Maestro provides the Peak and RMS acceleration according to ISO standards, including vector sum (weighted or unweighted).
For simple measurements, the optional single axis accelerometer can be used with a probe tip.
For measurements on hand tools, the noise option allows simultaneous Leq and Peak measurements along with the vibration data. Works with a small rugged ICP® microphone.
Vibration meter :
The basic configuration of Maestro provides single channel measurements, with or without a high pass filter. RMS measurements are available.
The ISO human vibration weightings are not included with this option, but the base instruments can be updated at any time to give a fully configured instrument as above
2MB memory capacity (up to 999 files with date/time information from the built-in real time clock)
dBTRAIT32 or dBFA32 software available for transferring stored results from the internal memory to a PC
Processing of results performed by the PC (time history plots with maximum, minimum and statistical results).
Graphs and tables can be printed directly or exported to word processors or spreadsheets for further presentation or archiving.
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Characteristics by model |
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Channels |
From I to 4 |
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Conditioning |
ICP® accelerometers. ICP® preamplifiers and microphones |
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Input |
8 pin LEMO connector |
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Transducers |
10 mV/g accelerometer and 50 mV/Pa ICP® microphone included in standard configuration - Other tranducers optional (100 mV/g accelerometer, 12.5 and 25 mV/Pa ICP® microphone with automatic adjustment of ranges and storage of calibration corrections) |
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Overload |
Independent detector for each channel |
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Ranges |
3 with amplification of 0 dB, 14 dB and 34 dB |
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Calibration |
Vibration: calibrator or sensitivity edition - Sound: calibrator only Memory 2 MB (approximately 17 h with 1 s time base) |
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Storage mode |
Data-logging or start-stop |
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Serial interface |
RS232 for data transfer |
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Analog outputs |
Band pass filtered 0.4 - 10000 Hz - Level +/- 1 V (+/-5 %) Output impedance : 100 Ohms - 4 pin Lemo connector ADC Input: 4 x 20 bits, sampling frequency 24 kHz |
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DAC |
Output : 4 x 20 bits DAC, sampling frequency 24 kHz |
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Battery life |
Approx. 8 h (4 channels). 13 h (1 channel) Control of the residual battery life |
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Dimensions |
21 cm x 9 cm x 5 cm |
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Weight |
With batteries: 520 g |
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Temperature |
Operating from -10 to 50ºC. |
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Vibration channels |
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Accuracy |
Class 1, ISO 8041 standard |
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Display resolution |
0.01 m/s2 for RMS, 0.1 m/s2 for Peak |
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standard triaxial accelerometer |
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Sensitivity |
10mV/g |
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Freq. Response |
0.5 to 6000 Hz |
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Max. accelerations |
500 g |
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Weight |
10.5 g (15.9 g with hand arm adapter) |
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Standard monoaxial accelerometer |
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Sensitivity |
10 mV/g |
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Cut-off freq. |
0.1 Hz (10 %) |
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Max. value |
500 g |
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Weight |
18g |
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Measurement ranges |
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Standard of ranges |
Peak ranges: 0-5000 m/s2. 0-1000 m/s2. O- 100 m/s2 RMS ranges are limited by a maximum displayed value of 655 m/s2 |
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Linearity range |
Peak: from 2 to 5000 m/s2 - RMS: from 0.2 to 655 m/s2 |
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Whole body |
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Results |
Calculations and display of peak and RMS weighted accelerations according to the whole body filters ISO 8041 /Al : 1998. 2 modes of calculation for multiaxial equivalent acceleration. |
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Option |
SEAT measurement (Seat Effective Acceleration Transmissibility): display of Peak and RMS weighted Z acceleration (from 4th channel) display of Z acceleration measured at seat level and vehicle floor ratio |
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Hand arm vibrations |
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Results |
Calculation and display of Peak and RMS accelerations on 3 axis band pass filtered (4 axis if using Aux) : 6.3- 1250 Hz Weighted RMS accelerations on 3 axes (4 if using Aux) hand arm filters according to ISO 804 1 /Al : 1998 Multiaxial equivalent acceleration on weighted channels |
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Basic vibration meter |
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Results |
Peak and RMS accelerations band pass filtered 0.4-1000 Hz or10- 1000 Hz |
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Acoustic channel (optional) |
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Accuracy |
Class 2. IEC 651 and IEC 804 |
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Measured quantities |
Leq A, C, Lin, Peak C and Lin |
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Display resolution |
0.1 dB |
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Standard ICP microphone |
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Microphone type |
Electret ¼ " |
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Sensitivity |
50 mV/Pa +/- 5% |
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Frequency response |
30 Hz to 15 kHz (+/- 3 dB) |
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Acoustic linearity range |
Leq A 37 - 130 dB, Leq C 40 - 130 dB, Leg L 44 - 130 dB Peak C 53 133 dB, Peak L 58 - 133 dB |
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Other |
Possibility to connect ICP® transducers of sensitivities 25 or |
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12.5 mV/Pa with automatic range adjustment |
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Accessories |
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Accelerometers and microphones Seat pad and hand arm adapters Magnetic mounting base and probe tip for monaxial accelerometer Pouch. carrying case Cables for analog output Mounting bracket to fix Maestro on any device Calibrators |
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Maestro system with tri-axial accelerometer and microphone
Maestro Front Panel
